[经] ratio of trade accounts payable to purchases

yīng fù zhàng kuǎn duì gòu huò de bǐ lǜ ㄧㄥ ㄈㄨˋ ㄓㄤˋ ㄎㄨㄢˇ ㄉㄨㄟˋ ㄍㄡˋ ㄏㄨㄛˋ ㄉㄜ˙ ㄅㄧˇ lv4